【摘 要】
：
Previously proposed differential modulation schemes for time-varying channels may not achieve the full transmit diversity and the maximum Doppler diversity simu
【机 构】
：
Department of Electronics & Information Engineering
【基金项目】
：
国家自然科学基金;国家高技术研究发展计划(863计划)
论文部分内容阅读
Previously proposed differential modulation schemes for time-varying channels may not achieve the full transmit diversity and the maximum Doppler diversity simultaneously. Based on an existing basis expansion model, a new differential space-time code, which wisely combines interleaver/de-interleaver with traditonal space-time transmitting technique to overcome such limitation, is presented. Two noncoherent differential decoders, named decision-feedback differential detector(DF-DD)and Viterbi-algorithm-based multiple-symbol-detection differential detector(MSD-DD), are also derived. We show that our design may recover data symbols with full antenna diversity and the maximum Doppler diversity at high signal-to-noise ratio. System performance is evaluated with simulations.
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